hmmm dousn't say much on what it eats though...
Well here's a bit o info on the northern clingfish, maybe it eats things that are similar.
U.S. Range in the Pacific Ocean Alaska to California (Eschmeyer and Herald 1983)
Habitat Intertidal, rocky with algae (kelp) (Eschmeyer and Herald 1983)
Depth range (meters) Down to 7.9 (Eschmeyer and Herald 1983)
Behavior Bottom-dwelling (Burgess et al. 1990)
General Temperature Range (°C) 24 (Burgess et al. 1990)
Average Maximum Overall Length (cm) 16 (Eschmeyer and Herald 1983, Burgess et al. 1990)
Adult Food Preference Invertebrates (Burgess et al. 1990)
Ornamental Market In aquarium guide (Burgess et al. 1990)
Additional Remarks Good community fish (Burgess et al. 1990)
Here's a discusion on wetwebmedia on clingfish:
http://www.wetwebmedia.com/clingfishfaqs.htm